pro - when combined with a remap and other supporting mods, can release a few extra ponies.
pro - lighter than standard cats
pro - can add a raspiness to exhaust note, and make it louder.
con - a decat will fail an mot emmissions test.
con - a racing high flow cat will need to be nice and hot before it will pass an MOT emissions test.
con - can add a raspiness to exhaust note, and make it louder.